Unicode Character 'HANGUL LETTER KIYEOK' (U+3131)

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Michael Kaplan's blog entry on sorting wierdness with this character and U+1100.

Unicode Data
Name HANGUL LETTER KIYEOK
Block Hangul Compatibility Jamo
Category Letter, Other [Lo]
Combine 0
BIDI Left-to-Right [L]
Decomposition <compat> HANGUL CHOSEONG KIYEOK (U+1100)
Mirror N
Old name HANGUL LETTER GIYEOG
Version Unicode 1.1.0 (June, 1993)
Encodings
HTML Entity (decimal) &#12593;
HTML Entity (hex) &#x3131;
How to type in Microsoft Windows Alt +3131
UTF-8 (hex) 0xE3 0x84 0xB1 (e384b1)
UTF-8 (binary) 11100011:10000100:10110001
UTF-16 (hex) 0x3131 (3131)
UTF-16 (decimal) 12,593
UTF-32 (hex) 0x00003131 (3131)
UTF-32 (decimal) 12,593
C/C++/Java source code "\u3131"
Python source code u"\u3131"
More...
Java Data
string.toUpperCase()
string.toLowerCase()
Character.UnicodeBlock HANGUL_COMPATIBILITY_JAMO
Character.charCount() 1
Character.getDirectionality() DIRECTIONALITY_LEFT_TO_RIGHT [0]
Character.getNumericValue() -1
Character.getType() 5
Character.isDefined() Yes
Character.isDigit() No
Character.isIdentifierIgnorable() No
Character.isISOControl() No
Character.isJavaIdentifierPart() Yes
Character.isJavaIdentifierStart() Yes
Character.isLetter() Yes
Character.isLetterOrDigit() Yes
Character.isLowerCase() No
Character.isMirrored() No
Character.isSpaceChar() No
Character.isSupplementaryCodePoint() No
Character.isTitleCase() No
Character.isUnicodeIdentifierPart() Yes
Character.isUnicodeIdentifierStart() Yes
Character.isUpperCase() No
Character.isValidCodePoint() Yes
Character.isWhitespace() No